Which of the following properties of the alkaline earth metals increase from Be to Ba?
(i) Atomic radius
(ii) Ionisation energy
(iii) Nuclear energy

Options

A. (i) and (ii)
B. (i) and (iii)
C. (ii) and (iii)
D. (i), (ii) and (iii)

Explanation

To determine which properties of alkaline earth metals increase from Beryllium (Be) to Barium (Ba), we will analyze each property given in the question: atomic radius, ionization energy, and nuclear energy.

### Step-by-Step Solution:

1. **Identify the Group and Elements**:
- The alkaline earth metals belong to Group 2 of the periodic table. The elements in this group include:
- Beryllium (Be)
- Magnesium (Mg)
- Calcium (Ca)
- Strontium (Sr)
- Barium (Ba)

2. **Analyze Atomic Radius**:
- As we move down the group from Be to Ba, the number of electron shells increases.
- Each new shell added increases the distance between the nucleus and the outermost electrons, leading to an increase in atomic size.
- **Conclusion**: The atomic radius increases from Be to Ba.

3. **Analyze Ionization Energy**:
- Ionization energy is the energy required to remove an electron from an atom.
- As we move down the group, the number of electron shells increases, which leads to increased shielding (screening effect) of the outer electrons from the nucleus.
- This makes it easier to remove an electron, resulting in a decrease in ionization energy.
- **Conclusion**: The ionization energy decreases from Be to Ba.

4. **Analyze Nuclear Energy**:
- Nuclear energy can be interpreted as the energy associated with the nucleus, which is influenced by the number of protons in the nucleus.
- As we move down the group from Be to Ba, the atomic number increases, which means the number of protons also increases.
- This increase in protons leads to an increase in nuclear energy.
- **Conclusion**: The nuclear energy increases from Be to Ba.

5. **Final Summary**:
- From the analysis:
- (i) Atomic radius: Increases from Be to Ba.
- (ii) Ionization energy: Decreases from Be to Ba.
- (iii) Nuclear energy: Increases from Be to Ba.
- Therefore, the properties that increase from Be to Ba are atomic radius and nuclear energy.

### Final Answer:
The properties of alkaline earth metals that increase from Be to Ba are:
- (i) Atomic radius
- (iii) Nuclear energy